eatATA (version 1.1.2)

dummiesToFactor: Convert dummy variables to factor.

Description

Convert multiple dummy variables into a single factor variable.

Usage

dummiesToFactor(dat, dummies, facVar, nameEmptyCategory = "_none_")

Value

A data.frame containing the newly created factor.

Arguments

dat

A data.frame.

dummies

Character vector containing the names of the dummy variables in the data.frame.

facVar

Name of the factor variable, that should be created.

nameEmptyCategory

a character of length 1 that defines the name of cases for which no dummy is equal to one.

Details

The content of a single factor variable can alternatively be stored in multiple dichotomous dummy variables coded with 0/1 or NA/1. 1 always has to refer to "this category applies". The function requires factor levels to be exclusive (i.e. only one factor level applies per row.).

Examples

# Example data set
tdat <- data.frame(ID = 1:3, d1=c(1, 0, 0), d2 = c(0, 1, 0), d3 = c(0, 0, 1))

dummiesToFactor(tdat, dummies = c("d1", "d2", "d3"), facVar = "newFac")